Electromechanical coupling factor of electrostrictive P(VDF-TrFE) copolymer

Electromechanical coupling factors of the high energy electron irradiated poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) copolymer are characterized at the quasi-static (1 Hz) and high frequency resonance states. It is found that the transverse electromechanical coupling factor k/sub 31/ of this material can reach more than 0.45. Furthermore, the result obtained from the resonance method is comparable to that from the quasi-static method.